For my cases that come up to 95-100% loading density,I do not use a drop tube.I have an old battery powered toothbrush. The kind that vibrates the head from side to side.
I just dump the powder into the case,put my finger over the case mouth,and hold the tooth brush against the side of the case for a few seconds.
When you take a peek in you think . . . "where did all that powder go ??". Depending on the type powder used,it usually goes down quite a bit.
Works great when loading supers for my 300BLK's. Keep an eye out at the yard sales. Mine runs forever on two "AA" batts. --- SAWMAN